Alamo Heights, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alamo Heights, a city in Bexar County, Texas.
This Afternoon
97°F
Mostly Sunny
Mostly sunny, with a high near 97. Heat index values as high as 103. South southeast wind around 5 mph.
7-day forecast for Alamo Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 97°F | Mostly Sunny | 5 mph SSE | 0% |
| Tonight | 74°F | Partly Cloudy | 0 to 10 mph SSE | 0% |
| Sunday | 98°F | Mostly Sunny | 0 to 5 mph S | 0% |
| Sunday Night | 75°F | Partly Cloudy | 0 to 5 mph SSE | 5% |
| Monday | 98°F | Mostly Sunny | 0 to 5 mph SE | 6% |
| Monday Night | 76°F | Mostly Clear | 0 to 5 mph SE | 14% |
| Tuesday | 98°F | Sunny | 0 to 10 mph E | 8% |
| Tuesday Night | 76°F | Partly Cloudy | 0 to 10 mph E | 14% |
| Wednesday | 98°F | Mostly Sunny | 5 to 10 mph ENE | 9% |
| Wednesday Night | 77°F | Partly Cloudy | 0 to 10 mph E | 10% |
| Thursday | 98°F | Mostly Sunny | 5 to 10 mph ENE | 6% |
| Thursday Night | 76°F | Partly Cloudy | 5 to 10 mph E | 4% |
| Friday | 97°F | Mostly Sunny | 5 to 10 mph ENE | 3% |
| Friday Night | 75°F | Partly Cloudy | 0 to 10 mph ESE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Alamo Heights (29.483, -98.468). Updated through the day.
Growing snapshot for Alamo Heights
Last spring frost
Feb 25
First fall frost
Nov 28
Growing season
277 days
Hardiness zone
9a
More local growing data for Alamo Heights: nearby ZIP 78209 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, San Antonio Incarnate Word, Tx (1.6 mi from Alamo Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.